Finding the Fourth Proportional to 1,109.27, 1,530.18 and 666.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.27 : 1,530.18 = 666.95 : x
2. Step 2: Convert to fraction form
   1,109.27/1,530.18 = 666.95/x
3. Step 3: Cross multiply
   1,109.27x = 1,530.18 × 666.95
4. Step 4: Simplify right side
   1,109.27x = 1,020,545.90
5. Step 5: Solve for x
   x = 1,020,545.90/1,109.27
6. Step 6: Final answer
   x = 920.01